Pinpoint Test F : Poor Sound Quality Or Distorted Sound (Buzz/Crackle/ Rattle) From One Or More Speakers (Not All Speakers): Notes

Diagnostic Overview 

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.

Normal Operation and Fault Conditions 

The audio DSP module sends audio signals to the speakers in the form of AC voltage, resulting in clear audio output. REFER to Information and Entertainment System - Sony ® Sound . See USB Audio Mode.

Possible Sources 

• Loose component fasteners
• Loose door handle, lock, and other trim panel components and fasteners
• Loose items in storage areas
• Loose speaker grilles
• Loose wire harnesses or wire harness fasteners
• Speaker(s)
• Water shield bonding and placement

Visual Inspection and Diagnostic Pre-checks 

Visually inspect around the suspect area for any possible rattle conditions such as:

• Any storage compartments including cup holders (if equipped)
• Door map pockets for contents that can rattle (if equipped)
• Door pull cup attachments (if equipped)
• Door switch bezels (if equipped)
• Package tray (if equipped)
• Speaker grilles
• Trim panels and fasteners